3rd boss from RIP 3: The Last Hero
This armored train called the "Steam Destroyer" is a boss that appears in third zone of the game.
It is armed with wagon that fires homing missles at its target and with three turrets that fire lead (two turrets are attached at wagon, while the other one is attached on train). If its weaponry gets destroyed then boss becomes really aggresive and dangerous, because it can move on surface, and will try to trample your bones to dust. In that phase you must fight against him like in spanish-style bullfighting type of conflict (you are matador, and train is bull).